Mixer/aerator



FIG. 1 is a front elevation view of a mixer/aerator showing our new design; the left, right, and rear elevation views of the design are identical; and,

FIG. 2 is a plan view thereof; the bottom view of the design is the mirror image of the top view.

The portions of the mixer/aerator shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a mixer/aerator, as shown and described. 